TM 5-5420-278-100018 000018 00-1OPERATING INSTRUCTIONSIMPROVED RIBBON BRIDGE (IRB)RAMP BAY M16NSN 5420-01-470-5825 P/N 12478918;INTERIOR BAY M17NSN 5420-01-470-5824 P/N 12478919.Section III. OPERATION UNDER USUAL CONDITIONSGENERALThis section provides instructions for the transport and use of ramp and interiorbays under normal operating conditions. Transportation instructions includeoperation of the CBT to load/unload the BAP, load/unload bays, launch and retrievebays, and site requirements. Operating instructions include procedures to securethe bay after launch, connecting of bays, bridge assembly methods, bridgeanchorage, operation, and recovery, and raft assembly procedures. CBT PREPARATION FOR USEOperation of the CBT and BAP under usual conditions is described in thissection. Operation under unusual conditions is described in WP 0045 00, Section IV. Prior to operating the CBT, the operator must perform the following:WARNINGThe Bridge Modules have a relatively high center ofgravity and can affect the common bridge transporter(CBT) dynamic performance. The CBT carrying a rampbay or interior bay can be operated on improved roadsat a maximum speed of 37 mph. If traversal of cross-country terrain is necessary to access an operation site,limit CBT speed to 15 mph or less.a. Review the HEMTT vehicle operating instructions prior to driving the CBT;refer to TM 9-2320-279-10.b. Review the proper hand signals for operation of the transporter boom, WP0018 00, figure 1, prior to using the LHS.A  RAISE THE LOADB  LOWER THE LOADC  RAISE THE BOOMD  LOWER THE BOOME  STOPABCDEFigure 1. Hand Signals for LHS.